DLMF:4.28.E2 (Q1839)

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DLMF:4.28.E2
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    Statements

    test
    cosh ⁡ z = e z + e - z 2 , 𝑧 superscript 𝑒 𝑧 superscript 𝑒 𝑧 2 {\displaystyle{\displaystyle\cosh z=\frac{e^{z}+e^{-z}}{2},}}
    0 references
    DLMF id
    DLMF:4.28.E2
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    Symbols used
    base of natural logarithm
    test
    e {\displaystyle{\displaystyle\mathrm{e}}}
    xml-id
    C4.S2.E11.m2aadec
    0 references
     
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